308 Gear Box Rebuild - Help? | FerrariChat
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308 Gear Box Rebuild - Help?

Discussion in 'Technical Q&A' started by tomoshea, Jul 5, 2005.

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  1. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
    Full Name:
    Tom O'Shea
    #1 tomoshea, Jul 5, 2005
    I am in the middle of a full rebuild on my 79 308 engine. The gearbox was having trouble in 1st and 2nd gear, I have decided to replace the synchros on all 5 since I have the engine completely stripped. The parts have been purchased at this stage (nice bill for original ZF parts!)

    Apart from doing the necessary to seperate the gearbox from the Crank I have not started to strip the gearbox yet.

    The Manual I think is close to useless, the drawings are not really much help!

    Does anyone have or know where to get a better guide to rebuilding a 308 gearbox?

    Or is there anyone out there who has gone through the process that I could email/ call during the process.

    I am based in Ireland, but international calls would not be an issue.

    Cheers

    Tom
     
  2. matteo

    matteo F1 World Champ

    Aug 1, 2002
    13,748
    On a plane somewhere
    Full Name:
    Heir Butt
    #2 matteo, Jul 5, 2005
    Which manual are you referring too? The 308qv-328 workshop manual?
     
  3. Verell

    Verell F1 Veteran
    Consultant Owner

    May 5, 2001
    7,022
    Groton, MA
    Full Name:
    Verell Boaen
    #3 Verell, Jul 5, 2005
    Any 3x8 parts catalog will help you a lot. The WSM will still be needed for bearing preload, etc of course. You can download from:

    http://ferrari.jenkins.org/books/
     
  4. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
    Full Name:
    Tom O'Shea
    #4 tomoshea, Jul 5, 2005
    I was looking at the 308gt4 workshop manual.

    Tom
     
  5. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
    Full Name:
    Tom O'Shea
    #5 tomoshea, Jul 5, 2005
    Ah ha thanks guys, just followed the link, the 328 manual is a lot better! and the parts book definitely is a lot better at showing how things go together in the gear box!

    Any rebuild experience out there?, what are the gotchas! in dismantle and rebuild?

    What are the things you need to look out for that the manual does not tell you
     
  6. nautique

    nautique Rookie

    Nov 1, 2003
    20
    Los angelas, CA
    Full Name:
    Craig Tempelton
    #6 nautique, Jul 5, 2005
    Tomoshea

    I have a 1MB pdf I can send you with lots of pictures. I saved it from an old FerrariChat post. Let me know an Email address I can use and I will send it to you

    ct
     
  7. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
    Full Name:
    Tom O'Shea
    #7 tomoshea, Jul 5, 2005
    Thanks Nautique, I just sent you a PM with my email details.

    Thanks
     
  8. quattrovalvole

    quattrovalvole Rookie

    Dec 13, 2004
    2
    Littleton CO
    Full Name:
    Steve
    #8 quattrovalvole, Jul 8, 2005
    I rebuilt mine and I can help if you need I also have a few spare parts that may help since I turned 2 gear boxes into one. The main problem I experienced was that the 1st gear blocking ring is harder than the 1st gear and this caused the 1st gear to wear. You need to place the new blocking ring on the gear (do this for each ring and gear) press the blocking ring against the gear (ring over gear mating the cone surfaces) if it has enough friction to hold the gear then it's okay but you also need to make sure that there is a small space between the blocking ring and gear. If not then the gear is worn out and won’t shift correctly.
     
  9. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
    541
    Ireland
    Full Name:
    Tom O'Shea
    #9 tomoshea, Jul 8, 2005
    Thanks QV,

    I amy PM you in the future if I need some help.

    Cheers

    Tom
     
  10. Artvonne

    Artvonne F1 Veteran

    Oct 29, 2004
    5,379
    NWA
    Full Name:
    Paul
    #10 Artvonne, Jul 14, 2005

    Steve, I sent you a PM
     
  11. Lorenzini

    Lorenzini Karting

    Sep 3, 2008
    85
    Granite Bay, CA
    Full Name:
    Kenneth D. Lawrence
    #11 Lorenzini, Oct 14, 2008
    I am in the process of rebuilding my 308 ger box but cannot seem to get the gear trains to drop down so I can replace the syncros. Would appreciate some help here. Thanks
     

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